Trestle



Feb 19 1924.

F. 1.. wicKl-mw TRESTLE Filed May 18, 1925 gwuntoz Frau-LR L. f Wickh amHim.

Patented Feb. 119, 1924.

pair

nearer 'rBEsrL-n.

Application filed May 18, 1923. Serial No. 639,837.

To' all whom it may concern: 7 7

Be it known that l, FRANK L. l VIGKHAM, a citizen of the UnitedStates,residing at Lennon, in the county of Genesee and State of Michigan, haveinvented certain new and useful Improvements in Trestles, of which thefollowing is a specification.

The present invention relates to an improved type of trestle for usewherever a raised stage or scaffold is desired by work men suchaslasterers lathers a erhan e'rs, painters, etc.

Heretofore it has'bee'n thepractice to use the so-called carpenters sawhorse in build, ing scafiolds of various heights and splicing thenormally very short legs or supports to suitthe particular job. Thisprocedure as well as the building of new tres tles to suit eachparticular job is expensive and takes considerable time and it is theprimary object of this invention to obviate this practice and provide anew and highly practical type of adjustable trestle.

Another object of the invention is to provide a trestle whichmay beadjusted to any desired height without splicing or cutting of materialand without the consumption of an excess'arnount of the workmans time.

Still another objectof this invention is to provide a trestle of sturdyconstruction which may be foldedto a minimum size,

when transport ng from (place to place-and thru narrow openings as wellas to provide a trestle which may be quickly set up and readilyadjusted.

Other objects of the invention will appear in the following detaileddescription taken in connection with the accompanying drawing, forming apart of this specification and in which drawing:

Figure 1 is a perspective view of the trestle.

Figure 2 is a vertical central section of the bracket member.

Figure 3 is a section taken on the line 3-3 of Figure 1, looking in thedirection of the arrows.

Figure l is a detail view of the linkby means of which the bracket isheld in position on. the prop.

Referring to the drawings in detail wherein similar reference charactersdesignate corresponding parts throughout the several views, the letter Adesignates a support for the prop B; C is the means of adjusting theangle between the support A justably carried on prop B; and E is adthethe and prop B; D is the bracket which is link means of adjusting andholding bracket D on prop B.

Referring in detail to the support A, such may be constructed ofanysuitable material, 7 such as metal or wood and has a pair of diverging.legs 5 and 6, held in spaced relation by braces 7 and, 8. A transversebolt or analogous member 9 passes through the upper end portions of legs5 and 6 to engage and pivotally support the prop B.

Concerning the prop B such may be made of any strong material and ofsize. It is supported at one end, as'hereinbefore described by thesupport member A and rests at its opposite end upon the floor or ground.Notches or pins .10 disposed at regular in tervals along a portion ofthe lower side of prop B afi'ord engaging means for adjusting a bracketD as will be hereinafter more fully described, while staples or simi laraperture forming means 11 are spaced along the under side of the prop Badjacent its lower end, as shownin Figure 1.

An angle adjusting means preferably in form of a rod is pivotallyconnected at one end as at 12'to brace 8 of the support A and is hookshaped at its opposite end to engage in any of the staples 11. Thisconstruction permits adjustability and allows the trestle to be set upon unevenground withthe upper surface of the bracket D in a horizontalplane, as well as to rigidly hold support A and prop B from collapsing.

The bracket D, preferably formed of wood is triangular in shape to slideon the inclined prop B and at the same time to present a substantiallyhorizontal surface as at 13 upon which the platform board (not shown inthe drawings), of a scaffold may be placed. To avoid sidewise motion ofbracket D and to form guides therefor, the depending members 14 carriedthereby engage the sides of the prop B. A metal bar 15 set in bracket Dand rigidly attached by screws or analogous means 16 has a projectinghook 17 at its upper end which is not entirely closed as shown in Figure2. When the maximum height attainable by bracket D is desired to beused, this hook 17 engages an eye 18 placed near the upper end of prop Bas clearly shown in Figure 1. To hold and adjust the bracket D along alower level, the link D, which has a length greater'than the width ofprop B, is introduced into hook 17 and caused to rest behind any one ofthe pins 10. It is obvious from the construction that any desired heightof bracket D may be obtained by sliding it along the inclined prop B. v

For convenience in adjustment, a scale 19 may be marked on either orboth sides of prop B which designates the height of surface 13 ofbracket D from the lower end of the prop.

Changes in details may be made without departing from the spirit of theinvention or the scope of the claims, but- I claim:

1. A trestle comprising in combination a support, a prop carried by saidsupport in angular relation thereto, said prop provided with a series ofabutments at its lower face, a bracket slidable on the upper surface ofsaid prop, said bracket provided with a hook at its upper end portion, alink carried by said hook and adapted to engage a selected abutment onsaid prop to retain the bracket in an adjusted position on said prop,and an eye at the upper end ofsaid prop to be engaged by said hook whenthe bracket is in its uppermost position on the prop.

2. A trestle comprising a support, a prop for said support provided withabutments spaced longitudinally of the prop, an eye carried by said propadjacent its upper end, a bracket movable along said prop, a hookcarried by said bracket for engaging said eye and retaining the bracketin its uppermost position upon the prop, and abutment engaging meansadapted to be releasably engaged with said hook and when in placeadapted to be selectively engaged with said abutments and retain thebracket in place intermediate the length of said prop.

3. A trestle comprising a support, a prop for said support, abutmentsspaced longitudinally of said prop, a bracket resting upon and movablealong said prop, a hook element carried by said bracket, means adjacentthe upper end of said prop for engagement by said hook to retain thebracket in its uppermost position upon the prop, and means releasablyengageable with said hook for engaging a selected abutment and retainingthe bracket in place intermediate the length of said prop.

4:. The structure of claim 3 having the abutment engaging meansconsisting of a ring engageable with the hook and adapted to fit aboutthe prop and engage a selected one of the abutments.

5. A trestle comprising a support including an element positioned at anincline when the support is in position for use, a bracket slidablealong the inclined element, a hook carried by the upper end portion ofsaid bracket, means carried by the upper end of the inclined element forengagement by said hook to releasably retain the bracket in itsuppermost position upon the inclined element, and means releasablyengageable with said hook for releasably retaining the bracket in placeintermediate the length of the inclined element.

6. A trestle comprising a support including a bar positioned at anincline when in use, abutments along the underface of said bar, abracket slidable along the upper face of said bar, a ring connected withthe upper end portion of said bracket and fitting about said bar forengaging said abutments and retaining thebracket inadjusted positionsupon the bar, and means for preventing the lower end of said bracketfrom slipping transversely off of said bar.

/ FRANK L. WIOKHAM.

